Microduino Is a Tiny Arduino Compatible Board with Stackable Shields

Microduino is a small board based on Atmel AVR or ATMega MCU which is software compatible with Arduino boards. The core board features the Atmel MCU, and Microduino shields can be stacked on the core board to add functionalities.

There are actually 2 core boards: Microduino core and Microduino core+ with more performance. They share the following specifications:

MCU:

Core – Atmel ATmega328P or ATmega168PA, equivalent to Arduino UNO

Core+ – Atmel ATmega644PA or ATmega1284P, with performance matching that of the Arduino Mega2560.

Other extention modules are currently under development to add a class-D amplifier, RTC, Wi-Fi, GPS and more. There are also other “base board” such as Microduino-Uno that offers Arduino UNO pinout compatibility and two slots for Microduino-core and Microduino-FT232R

Microduino is open source hardware, and you can find the relevant files on their wiki. There’s also plenty of documentation over there.

The company is currently for funds for mass production via a Kickstarter campaign where you can pledge as low as $32 to get Microduino core + Microduino-FT232R + Microduino-uno to get a an Arduino UNO software and hardware compatible board. Other pledges are available to get different shields combinations.